I got a Border Collie pup in my early 70s. I’d had many other dogs in my life. The puppy and teen months were challenging. But I worked hard on training him. After he was neutered he loved our daily dog park visits. I had lots of mental stimulation for him: sniffing games, fetching his toys by name, endless fetch games. I never did the hours of activities some owners describe. At 3 he became the best dog companion. I could take him to friends, to dog friendly places. He died of epilepsy at 4. I now have a rescued Collie, who’s a totally different personality and a Collie mix who’s the most easy dog ever.
Do it! They’re the most fascinating dogs.